Is anybody using multiple user accounts without issues ?

[Fourpiece]

Hi,  I'm wondering, if anybody is using multiple user accounts on XZP without issues ? It seems, that after Android 9 update some of apps and even GPS are not working correctly on any additional user account except for the main "master" one.  I'm talking about this feature Multiple user accounts .

[Fourpiece]

A small update: I've performed Software repair on my phone, logged into "administrator" primary account with one google account, then I created secondary User account and logged into it with my personal google account. The Camera app is still not able to save pictures on SD card under secondary user account, even though other apps (like Album) are able to read photos and other data from SD card without problems. Good news is, that GPS is now working under the secondary account as well, so thats one thing fixed. 

Could you please explain to me exactly, how the phone handles permissons and storage space allocation on SD card ?  Like if the "administrator" primary account can read and write anywhere on SD card, but the secondary User account can write and read only it's own data on SD card ?